Add debug key shortcut to dump texture atlas

2 files changed, 24 insertions, 0 deletions

diff --git a/src/main/java/makamys/neodymium/renderer/NeoRenderer.java b/src/main/java/makamys/neodymium/renderer/NeoRenderer.java
index f2591cb..5018e6b 100644
--- a/src/main/java/makamys/neodymium/renderer/NeoRenderer.java
+++ b/src/main/java/makamys/neodymium/renderer/NeoRenderer.java
@@ -313,6 +313,9 @@ public class NeoRenderer {
                 //chunk.chunkMeshes[7].quadCount = 256;
                 //setMeshVisible(chunk.chunkMeshes[7], true, true);
             }
+            if(Keyboard.isKeyDown(Keyboard.KEY_P) && !wasDown[Keyboard.KEY_P]) {
+                Util.dumpTexture();
+            }
         }
         for(int i = 0; i < 256; i++) {
             wasDown[i] = Keyboard.isKeyDown(i);
diff --git a/src/main/java/makamys/neodymium/util/Util.java b/src/main/java/makamys/neodymium/util/Util.java
index d39ccc7..89ab1ea 100644
--- a/src/main/java/makamys/neodymium/util/Util.java
+++ b/src/main/java/makamys/neodymium/util/Util.java
@@ -11,6 +11,10 @@ import java.nio.file.FileSystems;
 import java.nio.file.Files;
 import java.nio.file.Path;
 
+import org.apache.commons.io.FileUtils;
+import org.lwjgl.BufferUtils;
+import org.lwjgl.opengl.GL11;
+
 import net.minecraft.launchwrapper.Launch;
 
 public class Util {
@@ -85,4 +89,21 @@ public class Util {
                 Math.pow(y1 - y2, 2) +
                 Math.pow(z1 - z2, 2);
     }
+    
+    public static void dumpTexture() {
+        int width = GL11.glGetTexLevelParameteri(GL11.GL_TEXTURE_2D, 0, GL11.GL_TEXTURE_WIDTH);
+        int height = GL11.glGetTexLevelParameteri(GL11.GL_TEXTURE_2D, 0, GL11.GL_TEXTURE_HEIGHT);
+        
+        System.out.println("Dumped " + width + "x" + height + " texture.");
+        
+        ByteBuffer buf = BufferUtils.createByteBuffer(4 * width * height);
+        GL11.glGetTexImage(GL11.GL_TEXTURE_2D, 0, GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE, buf);
+        try {
+            // to convert to png:
+            // magick -size 512x256 -depth 8 out.rgba out.png
+            FileUtils.writeByteArrayToFile(new File("out.rgba"), Util.byteBufferToArray(buf));
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
 }